Because there is less blood regulating through the lungs and atria. The ventricles have to pump blood through the whole rest of your body.
Because the atria is soft lacks in the bone if the brain comes from atria it comes thinner
because thats the way God made it
yes ashboo
Assuming you mean the atria and ventricles by "the two heart chambers", the fact that in all species the atria are smaller than the ventricles reflects the fact that the atria receive blood from either the body or the lungs and then pump it into the larger and much stronger ventricles. One-way valves between the atria and ventricles prevent backflow of blood from the ventricles to the atria. The ventricles then pump the blood received from the atria to either the oxygenating organ (i.e. gills or lungs) or the body. The much thicker walls of the ventricles reflect the fact that much greater force is needed to pump the blood throughout the body or to the lungs than is needed to pump the blood from the atria to the ventricles.
When relaxed, the atria expand, and then the ventricles contract.
Yes, atria contracts before the ventricles.
because it is oxygenated blood
the difference between the ventricles and the atria is that the ventricles are thicker
The atria form the smaller part of the heart, while the ventricles form the larger part of the heart.
The Ventricles are bigger and rougher than the AtriumsThe Ventricles are bigger and rougher than the Atriums.sizeshapewall thickness
uricles are part of the atria and serve to increase the volume of the atria. The atria that they are a part of serve to direct blood into the ventricles and are not very muscular. The ventricles are far more muscular than the atria and serve to pump blood to either the lungs or the rest of the body ( the right and left ventricles respectively).
upper left and right atria and lower left and right ventricles. Atria are divided by interatrial septum&ventricles by interventricular septum.Both Atria&Ventricles are separated by tricuspid&bicuspid valves
ventricles
The Atria and Ventricles are parts of the heart not the blood. The Atria is the upper chambers of the heart and the Ventricles are the lower chambers of the heart.
Atria is the receiving chamber and it is located at the top while ventricles are the one responsible for pumping blood out of the heart either to oxygenate the blood or to deliver it into our systems and it is located at the bottom part of the heart